Rotary pump



Sept. 30 1924. 1,509,917

H. H. wEsTlNGHoUsE ROTARY PUMP Filed July 8, 1922 INVENTOR HENRY H.WETINGHOU6E ATTORNEY Patented Sept. 30, 1924.

UNITED STATES PATENT carica.

HENRY H. WESTINGHOUSE, OF NEW YORK, N. Y., ASSIGNOR 'IO THE WESTINGHUSE AIR BRAKE COMPANY, OF WILMERDING, PENNSYLVANIA, A CORPORATION OF,

PENNSYLVANIA.

ROTARY BUMP.

Application led July 8,

To all whom it may concern.:

Be it known that I, HENRY Il. TESTING- HoUsE, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented new and useful lmprovements in Rotary Pumps, of which the following is a specification.

This invention relates to a lubricating systemmore particularly adapted for lubril@ eating the moving parts of a rota-ry fluid exhauster or pump.

The principal object ot my invention is to provide an improved lubricating system of the above character.

ln the accompanying drawing; Fig. 1 is a central section of a rotary Huid exhauster embodying my invention; Fig. 2 a section on the line 2-2 of Fig. 1; and Fig. 3 a longitudinal section of the end portion of the exhauster, showing the relief valves.

' As shown in the drawing, the exhauster may comprise a cylinder formed of half cylinders 1 and 2 bolted together. The half cylinder 1 is counterbored to receive a bushing 25 3 which is pressed into place and said bushing provides a bearing for a rotatable ring 4. Mounted in ball bearings 5 at opposite ends of the cylinder and disposed eccentrically of the cylinder, as shown in Fig. 2 is a shaft 6 and keyed to the shaft is a rotor drum 7 having radial slots 8 for receiving radially movable blades or vanes 9, said blades being provided with bearing strips 10 adapted to bear against the interior wall of the rotor cylinder. Integral with the pump frame is a casing 11, within which the rotor cylinder is mounted, the open end of the casing being closed by a casing cap plate 12.

The casing 11 provides an oil reservoir 13 around the rotor cylinder, in which is contained lubricating oil for lubricating the movin parts of the eXhauster. Oil is supplied From the reservoir 13 through a passage 14 and past a regulating valve 15 to a longitudinal bore 16 which communicates withia plurality of passages 17 opening at the bearing surface of the rotor cylinder and also with an annular groove 18 formed in the bushing 3. Spaced ports 19Alead from the groove 18 to the bearing face of the guide ring 4.

The Huid discharge assage 20 from the exhauster cylinder lead to the upper por- 1922. Serial No. 573,680.

tion of the oil reservoir 13 and is connected to a cylindrical discharge nozzle 21 having 1ts outer end closed by a plug 22. The nozzle 21 is provided with longitudinal slots 23 and oil outlet ports 24 and a hood like baile plate 25 is mounted over the nozzle, as shown in Fig. 2, to assist in separating oil from the fluid discharged from the exhauster. Relief valves 26 may be provided, which control passages leading to the rotor cylinder, so that if the pressure of oil within the rotor cylinder should exceed a predetermined degree, the relief valves will open and allow oil trapped in the rotor cylinder to escape from the cylinder into the oil' reservoir 13.

Underneath the oil hole 24 at one end of the exhauster, the half cylinder 1 is provided with an oil pocket 27 and underneath the oil hole 24 at the other end is an oil pocket 28 in the half cylinder 2. Leading fromthe pocket 27 is a passage 29 for'supplyingi lubricating oil to the bearing 5 at one end and a passage 30 supplies oil from pocket 28 to the bearing 5 at the other end of the eX- hauster.

ln operation, when the eXhauster is running, uid is exhausted from the system to which the exhauster may be connected by way of the inlet ports 31, the fluid being carried between adjacent blades 5 of the rotor around the rotor cylinder and being discharged through the discharge passage 2O to the discharge nozzle 21.

The partial vacuum created by the rotation of the blades 9 is sullicientto cause the 'atmospheric pressure acting on the body of oil in the reservoir 13 to force oil throu h the passage 14 and past the valve 15 to t e bore 16. Thence oil flows through the passages 17 so as to provide lubrication for the bearing :tace of t-he rotor cylinder. Oil also flows into and fills the i oove 18, so that oil is then supplied throug the ports 19 to the bearing face of the bearing ring 4.

Fluid lowing into vthe discharge nozzle 21 flows out through the slots 23 and impinges on the balile plate 25, so that oil entrained with the fluid tends to collect on the under face of the ballie plate, and the fluid then passes around the .balile plate and escapes to the discharge pipe 32.

Some of the oil collected on the baille plate Will ifall into the pockets 27 and 28 .the respective'passages 29 a and this oil will then be supplied through 30 to lubricate the shaft bearings 5, 5.

Oil collected on the plate which does not fall into the pockets 27 and 28 will fall. back into the oil reservoir 13. Some of the oil entrained in the fluid exhausted will also be separated from the fluid while passin through the discharge nozzle and this oi will flow through fthe ports 24 into the pockets 27 and 28.

The amount of oil suplied may be regulated by adjusting 't e regulating pin valve 15.

Should an excessive amount of oil collect in the rotor cylinder, the pressure thus create will cause the relief valves 26 to open, so that the pressure is relieved by the escape of oil from the cylinder tothe oil reservoir 13.

It will be understoodthat while the construction has been described as a fluid exhauster, ity would also operate 'as a fluid .com ressor and in fact may be termed a flui pump.

Having now described my invention, what I claim as new and desire to secure by Letters Patent,`is:-

1. In a rotary fluid exhauster, the combination with a cylinder and a pump rotor in said cylinder for exhausting fluid, of a reservoir containing a body of oil subject to atmospheric pressure and a passage establishing communication from the oil reservoir to the rotor cylinder at a point above the level of oil in the reservoir whereby the oil is raised from the reservoir and supplied to the cylinder by the partial vacuum created by the action of the exhauster.

2. In a rotary fluid exhauster, the combination with a cylinder and a pump rotor in said cylinder for exhausting fluid, of means for lubricating the cylinder and a discharge nozzle mounted in axial alinement with the longitudinal axis of the cylinder for receiving fluid discharged from the exhauster having openings forppermittin the outflow of fluid and ports thru h whic oil separated from the fluid and eposited in the nozzle will drain.

3. In a rotary fluid exhauster, the combination with a cylinder and apump rotor in said cylinder for exhaustingfluid, of means for lubricating the cylinder, a dis- \charge pipe located adjacent to said cylinder into which the fluid discharged from thecylinder passes and having ports through which oil is separated from the fluid and deposited in the pipe may drain, and means for supplying the drained oil to lubrcate moving parts of the exhauster. i

4. In a rotary fluid exhauster, the combination with a cylinder and a pump rotor in said cylinder for exhausting fluid, of means for lubricating the cylinder, a discharge pipe located adjacent to said cylinder into which the fluid discharged from the cylinder passes and having openings through which fluid esca s from the discharge pipe and ports t rough which oil separated from the fluid and deposited in the pipe may drain, a baille late against which fluid escaping from tiie discharge pipe impinges, and means for collecting oil deposited from the fluid on the baffle plate and oil drained from the discharge pipe and for supplying said oil to the moving parts of the exhauster.

In testimony whereof I have hereunto set my hand.

HENRY H. WESTINGHOUSE. 

